Cement-mold.



PATENTED DEC. 12, 1905.

R. B. UOLTRIN.

CEMENT MOLD.

APPLICATION FILED MAY 20, 1905.

mifiay es UNITED STATES PATENT oFFIoE.

Specification of Letters Patent.

iatented. Dec. 12, 1905.

Application filed May 20, 1905. Serial No. 261,407.

To all whom, it may concern:

Be it known that I, ROBERT B. OoL'rRIN, a citizen of the United States,residing at J ackson, in the county of Jackson and State of Michigan,have invented certain new and useful Improvements in Cement-Molds; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to molds having separable sides and ends which areadapted to be closed and secured together and to be opened or separatedfor releasing the molded article. Molds of this class are used largelyfor making cement blocks or stone.

My invention consists of an improved apparatus of this character havingsimple and efficient means for connecting and operating the separablesides and ends, and, further, in combination with the mold, an effectivedevice for clamping the top and bottom thereto.

The invention will hereinafter be fully described with reference to theaccompanying drawings, which form a part of this specification, and thenparticularly pointed out and defined in the claims following thedescription.

' In said drawings, Figure 1 is a perspective view showing the moldopen. Fig. 2 is a perspective view showing the mold closed. Fig. 3 is adetail View of a clamp-frame.

A A denote the sides, and B B the ends, of the mold. metal plates. 1

O C are irons bolted or otherwise attached to the outer faces of theside members A at the ends thereof. From these irons project arms orextensions D. The pair of said arms D at each end of the mold arearranged convergingly or inclined toward each other. Said arms D extendloosely through the end members B, the

openings therefor being likewise inclined and shaped to provide asliding it on the arms.

E E are irons or plateson the outer faces of the end members B. The armsD extend also through these plates E, which are provided with slots oropenings to receive said arms, said openings being continuations of theopenings in the end members B, or, if desired, the openings in the endmembers B may be considerably larger than the arms D, while the openingsin the plates E are shaped to fit slidably on said arms D to increasethe ease of the sliding movement.

F F are cam-levers for opening and closing These may be wooden boards orthe mold. Two of such levers are provided at each end of the apparatus,being pivoted or fulcrumed on the ends of the inclined arms D D. Theselevers are manipulated by their handles, and their cams G bear againstthe end members B, or rather against the irons or bearing-plates Ethereof. The cams G of the levers are shown bifurcated to embrace thearms D, to which they are pivoted, and said cams are also formedannular, and they pass through straps H on the irons or plates E. Saidstraps H may be integral with said plates E or bolted or screwed theretoand to the end members B.

The operation of the apparatus as thus constructed will be apparent fromthe drawings. In Fig. 1 the mold is shown open. the sides A A and ends BB being separated by reason of the position of the cam-levers F F. Toclose and tighten the mold, said cam-levers are moved to the positionshown in Fig. 2, causing the cams G to bear forcibly against the endmembers B, or rather against the bearing-plates E thereof, and thusforcing said members inwardly against the ends of the side members A A.The inward movement of said end members B B upon the con- J denotes abase or bottom plate or board,

and K a top or cover.

The aforementioned device for clamping the top and cover to the mold isas follows: L denotes an iron having a lateral lug or extension at itslower end which engages under the bottom or base J of the mold. M is aniron adjustably attached to the iron L, as by means of the thumb-nut N,which is screwed on a bolt extending through a longitudinal slot inmember L. This adjustment is to adapt the device to molds of differentheights. To the upper iron M is pivoted or fulcrumed a cam-lever 0. Whenthe lever O is forced downward, its cam portion bears against the top ofthe mold, and thus rigidly clamps the top and bottom. Two or more ofthese devices may be employed at opposite sides of the apparatus.

In Fig. 3 I have illustrated a spring-steel clamp-frame R for clampingaround the mold, enabling the mold to be turned over before opening itto release it of its contents. The hinged piece 0 may be of iron and isprovided with teeth adapted to engage or hook to the top piece 1", whichis provided with a handle.

When the mold is closed, it may be held rigidly in closed position bymeans of latches d, shown pivoted to the irons e and adapted to engagenotches or slots in the oblique arms D.

I be considered the ends, and vice versa.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members, the arms at each end of the mold being inclined inconverging directions, and devices mounted on said arms outside the endmembers for forcing them toward each other.

2. A mold having separable side and end members, arms extending from theends of said side members and passsing slidably through openingstherefor in the end members, the arms at each end of the mold beinginclined in converging directions, and levers fulcrumed on said armshaving means for forcing inwardly the end members, whereby the inwardmovement of the end members also forces inwardly the side members.

3. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members, the arms at each end of the mold being inclined inconverging directions, and levers pivoted to said arms outside of andconnected to said end members for operating and closing the mold.

4. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members, the arms at each end of the mold being inclined inconverging directions, and levers pivoted to said arms having camsbearing against the end members.

5. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members, the arms at each end of the mold being inclined inconverging directions, and levers pivoted to said arms outside the endmembers having cams bearing against the end members, whereby the mold isoperated for closing by forcing the cams against said end members, andmeans for separating by reverse movement of said levers.

6. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members, the arms at each end of the mold being inclined inconverging directions, and levers outside the mold pivoted to the saidarms having cams bearing against the end members, said cams beingannular, and straps on said end members engaged by said cams.

7. A mold having separable side and end members, arms extending from theends of said side members and passing slidably through openings thereforin the end members,the

arms at each end of the mold being inclined in converging directions,bearing-plates on the outer faces of the end members, and levers pivotedto said arms having cams bearing against said plates.

8. A mold having separable side and end.

the end members whereby the inward movement of the end members alsoforces inwardly the side members, and latches on the end members adaptedto engage catches in said oblique arms when the mold is closed.

In testimony whereof I aiiix my signature in presence of two witnesses.

ROBERT B. COLTRIN.

Witnesses:

JAMES VAN BUREN, BERTHA L. TRINKAUS.

